Capital refers to the financial resources, typically money or assets, that traders and investors use to generate profits through trading activities. In trading contexts, capital represents the funds available for purchasing securities, commodities, or other financial instruments. This includes both the initial investment amount and any profits that are reinvested back into trading activities.

Effective capital management is crucial for trading success and involves determining appropriate position sizes, maintaining adequate reserves, and protecting against significant losses. Traders must balance risk and reward while preserving enough capital to continue operating through inevitable losing periods. Various forms of capital include trading capital (money specifically allocated for trading), risk capital (funds one can afford to lose), and working capital (funds needed for daily operations).

Real-world example: A day trader allocates $100,000 as trading capital, using only 2% ($2,000) per trade to manage risk while preserving capital for future opportunities.